Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_latest_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.0.0-master/package.mo", uses=false) Using package Buildings with version 11.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.0.0-master/package.mo) Using package Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo) Using package Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Running command: "" <> buildModelFMU(Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume,fileNamePrefix="Buildings_latest_Buildings_Airflow_Multizone_Examples_ChimneyShaftWithVolume",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume,fileNamePrefix="Buildings_latest_Buildings_Airflow_Multizone_Examples_ChimneyShaftWithVolume",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001503/0.001503, allocations: 111.3 kB / 15.23 MB, free: 0.6367 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001664/0.001664, allocations: 196 kB / 16.14 MB, free: 6.727 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.465/1.465, allocations: 222.9 MB / 239.8 MB, free: 4.602 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.0.0-master/package.mo): time 2.623/2.623, allocations: 461.9 MB / 0.7342 GB, free: 14.19 MB / 0.5919 GB Notification: Performance of FrontEnd - loaded program: time 0.001343/0.001343, allocations: 66.09 kB / 0.8985 GB, free: 37.02 MB / 0.7169 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2631/0.2644, allocations: 157.4 MB / 1.052 GB, free: 8.227 MB / 0.8106 GB Notification: Performance of NFInst.instantiate(Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume): time 0.7545/1.019, allocations: 233.7 MB / 1.28 GB, free: 2.027 MB / 0.9981 GB Notification: Performance of NFInst.instExpressions: time 0.01415/1.033, allocations: 10.52 MB / 1.291 GB, free: 1.828 MB / 0.9981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002346/1.036, allocations: 54.38 kB / 1.291 GB, free: 1.828 MB / 0.9981 GB Notification: Performance of NFTyping.typeComponents: time 0.002591/1.038, allocations: 1.035 MB / 1.292 GB, free: 1.797 MB / 0.9981 GB Notification: Performance of NFTyping.typeBindings: time 0.008135/1.046, allocations: 3.445 MB / 1.295 GB, free: 1.617 MB / 0.9981 GB Notification: Performance of NFTyping.typeClassSections: time 0.004756/1.051, allocations: 1.884 MB / 1.297 GB, free: 1.555 MB / 0.9981 GB Notification: Performance of NFFlatten.flatten: time 0.006448/1.058, allocations: 6.28 MB / 1.303 GB, free: 1.543 MB / 0.9981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001836/1.059, allocations: 1.332 MB / 1.304 GB, free: 1.352 MB / 0.9981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00253/1.062, allocations: 1.38 MB / 1.306 GB, free: 1.348 MB / 0.9981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002499/1.064, allocations: 1.541 MB / 1.307 GB, free: 1.297 MB / 0.9981 GB Notification: Performance of NFPackage.collectConstants: time 0.0002309/1.065, allocations: 96 kB / 1.307 GB, free: 1.297 MB / 0.9981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.006599/1.071, allocations: 3.737 MB / 1.311 GB, free: 1.262 MB / 0.9981 GB Notification: Performance of NFScalarize.scalarize: time 0.0006263/1.072, allocations: 0.6167 MB / 1.312 GB, free: 1.184 MB / 0.9981 GB Notification: Performance of NFVerifyModel.verify: time 0.001111/1.073, allocations: 0.9715 MB / 1.313 GB, free: 0.8906 MB / 0.9981 GB Notification: Performance of NFConvertDAE.convert: time 0.005664/1.079, allocations: 3.947 MB / 1.316 GB, free: 460 kB / 0.9981 GB Notification: Performance of FrontEnd - DAE generated: time 4.398e-06/1.079, allocations: 5.734 kB / 1.316 GB, free: 460 kB / 0.9981 GB Notification: Performance of FrontEnd: time 9.41e-07/1.079, allocations: 0 / 1.316 GB, free: 460 kB / 0.9981 GB Notification: Performance of Transformations before backend: time 2.685e-05/1.079, allocations: 0 / 1.316 GB, free: 460 kB / 0.9981 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 344 * Number of variables: 344 Notification: Performance of Generate backend data structure: time 0.00497/1.084, allocations: 2.481 MB / 1.319 GB, free: 15.28 MB / 1.014 GB Notification: Performance of prepare preOptimizeDAE: time 3.907e-05/1.084, allocations: 11.94 kB / 1.319 GB, free: 15.28 MB / 1.014 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0002136/1.084, allocations: 203 kB / 1.319 GB, free: 15.23 MB / 1.014 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.003249/1.087, allocations: 0.5325 MB / 1.32 GB, free: 15.12 MB / 1.014 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001695/1.089, allocations: 1.219 MB / 1.321 GB, free: 14.7 MB / 1.014 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.625e-05/1.089, allocations: 106 kB / 1.321 GB, free: 14.7 MB / 1.014 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001673/1.089, allocations: 130.6 kB / 1.321 GB, free: 14.7 MB / 1.014 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002335/1.092, allocations: 1.671 MB / 1.323 GB, free: 14.49 MB / 1.014 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.228e-05/1.092, allocations: 5.938 kB / 1.323 GB, free: 14.49 MB / 1.014 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001235/1.092, allocations: 57.78 kB / 1.323 GB, free: 14.49 MB / 1.014 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.315e-05/1.092, allocations: 72.73 kB / 1.323 GB, free: 14.48 MB / 1.014 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002165/1.094, allocations: 1.442 MB / 1.324 GB, free: 14.46 MB / 1.014 GB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.007441/1.101, allocations: 6.961 MB / 1.331 GB, free: 11.06 MB / 1.014 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001629/1.103, allocations: 1.195 MB / 1.332 GB, free: 10.83 MB / 1.014 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0008138/1.104, allocations: 0.614 MB / 1.333 GB, free: 10.81 MB / 1.014 GB Notification: Performance of preOpt evalFunc (simulation): time 0.000841/1.105, allocations: 0.8634 MB / 1.334 GB, free: 9.875 MB / 1.014 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0009293/1.106, allocations: 0.6131 MB / 1.334 GB, free: 9.812 MB / 1.014 GB Notification: Performance of pre-optimization done (n=110): time 3.196e-06/1.106, allocations: 3.938 kB / 1.334 GB, free: 9.809 MB / 1.014 GB Notification: Performance of matching and sorting (n=110): time 0.002872/1.109, allocations: 1.573 MB / 1.336 GB, free: 9.664 MB / 1.014 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.434e-05/1.109, allocations: 93.41 kB / 1.336 GB, free: 9.566 MB / 1.014 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001365/1.11, allocations: 1.196 MB / 1.337 GB, free: 9.398 MB / 1.014 GB Notification: Performance of collectPreVariables (initialization): time 8.495e-05/1.11, allocations: 47.17 kB / 1.337 GB, free: 9.367 MB / 1.014 GB Notification: Performance of collectInitialEqns (initialization): time 0.00044/1.111, allocations: 0.6778 MB / 1.338 GB, free: 9.133 MB / 1.014 GB Notification: Performance of collectInitialBindings (initialization): time 0.0003103/1.111, allocations: 382.5 kB / 1.338 GB, free: 8.891 MB / 1.014 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003376/1.111, allocations: 176.2 kB / 1.338 GB, free: 8.871 MB / 1.014 GB Notification: Performance of setup shared object (initialization): time 0.0001628/1.111, allocations: 348.2 kB / 1.338 GB, free: 8.562 MB / 1.014 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007954/1.112, allocations: 435.3 kB / 1.339 GB, free: 8.547 MB / 1.014 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0007545/1.113, allocations: 0.5535 MB / 1.339 GB, free: 8.438 MB / 1.014 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001389/1.114, allocations: 1.01 MB / 1.34 GB, free: 8.332 MB / 1.014 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.707e-06/1.114, allocations: 0 / 1.34 GB, free: 8.332 MB / 1.014 GB Notification: Performance of matching and sorting (n=126) (initialization): time 0.001821/1.116, allocations: 1.227 MB / 1.342 GB, free: 8.191 MB / 1.014 GB Notification: Performance of prepare postOptimizeDAE: time 1.771e-05/1.116, allocations: 7.688 kB / 1.342 GB, free: 8.191 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.336e-06/1.116, allocations: 3.344 kB / 1.342 GB, free: 8.191 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.67e-05/1.116, allocations: 4.781 kB / 1.342 GB, free: 8.191 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0009083/1.117, allocations: 213.5 kB / 1.342 GB, free: 8.191 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.381e-05/1.117, allocations: 9.469 kB / 1.342 GB, free: 8.191 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001372/1.119, allocations: 184.3 kB / 1.342 GB, free: 8.129 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.779e-05/1.119, allocations: 38.19 kB / 1.342 GB, free: 8.129 MB / 1.014 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001053/1.12, allocations: 0.7382 MB / 1.343 GB, free: 8.043 MB / 1.014 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.000693/1.12, allocations: 0.5457 MB / 1.343 GB, free: 7.938 MB / 1.014 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001327/1.122, allocations: 0.9941 MB / 1.344 GB, free: 7.828 MB / 1.014 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.525e-06/1.122, allocations: 0 / 1.344 GB, free: 7.828 MB / 1.014 GB Notification: Performance of matching and sorting (n=126) (initialization_lambda0): time 0.001661/1.123, allocations: 1.196 MB / 1.345 GB, free: 7.699 MB / 1.014 GB Notification: Performance of prepare postOptimizeDAE: time 9.798e-06/1.124, allocations: 5 kB / 1.345 GB, free: 7.699 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.398e-06/1.124, allocations: 1.875 kB / 1.345 GB, free: 7.699 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (initialization): time 7.013e-06/1.124, allocations: 6.781 kB / 1.345 GB, free: 7.699 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008509/1.124, allocations: 211.5 kB / 1.346 GB, free: 7.699 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.227e-06/1.124, allocations: 10.62 kB / 1.346 GB, free: 7.699 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001276/1.126, allocations: 166.6 kB / 1.346 GB, free: 7.648 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.061e-05/1.126, allocations: 40.16 kB / 1.346 GB, free: 7.645 MB / 1.014 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 11 * Number of states: 0 () * Number of discrete variables: 5 ($PRE.mRoo_flow.nextTimeEvent,$whenCondition1,mRoo_flow.nextTimeEventScaled,$PRE.mRoo_flow.nextTimeEventScaled,mRoo_flow.nextTimeEvent) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (126): * Single equations (assignments): 126 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.000264/1.126, allocations: 239.1 kB / 1.346 GB, free: 7.461 MB / 1.014 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002048/1.126, allocations: 149.4 kB / 1.346 GB, free: 7.387 MB / 1.014 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001961/1.128, allocations: 1.239 MB / 1.347 GB, free: 7.301 MB / 1.014 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.246e-06/1.128, allocations: 17.31 kB / 1.347 GB, free: 7.297 MB / 1.014 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.61e-06/1.128, allocations: 0 / 1.347 GB, free: 7.297 MB / 1.014 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001447/1.13, allocations: 1.005 MB / 1.348 GB, free: 7.211 MB / 1.014 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004338/1.134, allocations: 3.171 MB / 1.352 GB, free: 6.539 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.36e-06/1.134, allocations: 2.125 kB / 1.352 GB, free: 6.539 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001028/1.135, allocations: 228.7 kB / 1.352 GB, free: 6.531 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (simulation): time 8.416e-06/1.135, allocations: 11.28 kB / 1.352 GB, free: 6.527 MB / 1.014 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.545e-05/1.135, allocations: 29.33 kB / 1.352 GB, free: 6.512 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 6.993e-06/1.135, allocations: 6.5 kB / 1.352 GB, free: 6.512 MB / 1.014 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.226e-06/1.135, allocations: 5.031 kB / 1.352 GB, free: 6.512 MB / 1.014 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002664/1.138, allocations: 1.913 MB / 1.354 GB, free: 5.586 MB / 1.014 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0006068/1.138, allocations: 364.1 kB / 1.354 GB, free: 5.328 MB / 1.014 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001967/1.139, allocations: 24.89 kB / 1.354 GB, free: 5.316 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001043/1.14, allocations: 116 kB / 1.354 GB, free: 5.281 MB / 1.014 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001504/1.14, allocations: 75.52 kB / 1.354 GB, free: 5.266 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.446e-05/1.14, allocations: 39.89 kB / 1.354 GB, free: 5.258 MB / 1.014 GB Notification: Performance of sorting global known variables: time 0.000975/1.141, allocations: 0.8312 MB / 1.355 GB, free: 4.934 MB / 1.014 GB Notification: Performance of sort global known variables: time 1.2e-07/1.141, allocations: 0 / 1.355 GB, free: 4.934 MB / 1.014 GB Notification: Performance of remove unused functions: time 0.001804/1.143, allocations: 0.8345 MB / 1.356 GB, free: 4.766 MB / 1.014 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 11 * Number of states: 9 (roo.dynBal.medium.Xi[1],roo.dynBal.U,roo.dynBal.m,oriChiTop.mExc,oriBot.mExc,oriChiBot.mExc,sha.vol.dynBal.medium.Xi[1],sha.vol.dynBal.U,sha.vol.dynBal.m) * Number of discrete variables: 3 ($whenCondition1,mRoo_flow.nextTimeEvent,mRoo_flow.nextTimeEventScaled) * Number of discrete states: 2 (mRoo_flow.nextTimeEvent,mRoo_flow.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (110): * Single equations (assignments): 108 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.004065/1.147, allocations: 2.935 MB / 1.359 GB, free: 2.98 MB / 1.014 GB Notification: Performance of simCode: created initialization part: time 0.00273/1.15, allocations: 1.613 MB / 1.36 GB, free: 2.277 MB / 1.014 GB Notification: Performance of simCode: created event and clocks part: time 4.478e-06/1.15, allocations: 2.531 kB / 1.36 GB, free: 2.277 MB / 1.014 GB Notification: Performance of simCode: created simulation system equations: time 0.0008384/1.15, allocations: 0.5628 MB / 1.361 GB, free: 2.051 MB / 1.014 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003501/1.154, allocations: 0.8334 MB / 1.362 GB, free: 1.625 MB / 1.014 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01662/1.171, allocations: 12.61 MB / 1.374 GB, free: 9.305 MB / 1.029 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008524/1.171, allocations: 1.367 MB / 1.375 GB, free: 8.297 MB / 1.029 GB Notification: Performance of simCode: alias equations: time 0.001751/1.173, allocations: 455.6 kB / 1.376 GB, free: 8.09 MB / 1.029 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0008288/1.174, allocations: 0.6256 MB / 1.376 GB, free: 7.512 MB / 1.029 GB Notification: Performance of SimCode: time 7.72e-07/1.174, allocations: 0 / 1.376 GB, free: 7.512 MB / 1.029 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.5667/1.741, allocations: 40.88 MB / 1.416 GB, free: 15.22 MB / 1.076 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0003577/1.741, allocations: 262.4 kB / 1.417 GB, free: 14.9 MB / 1.076 GB Notification: Performance of buildModelFMU: Generate platform static: time 2.839/4.581, allocations: 4 kB / 1.417 GB, free: 14.89 MB / 1.076 GB (rm -f Buildings_latest_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe ; mkfifo Buildings_latest_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe ; head -c 1048576 < Buildings_latest_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe >> ../files/Buildings_latest_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_latest_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume_res.mat --tempDir=temp_Buildings_latest_Buildings_Airflow_Multizone_Examples_ChimneyShaftWithVolume_fmu --startTime=0 --stopTime=3600 --timeout=50 --tolerance=1e-06 Buildings_latest_Buildings_Airflow_Multizone_Examples_ChimneyShaftWithVolume.fmu > Buildings_latest_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe 2>&1)